In lock down I was free so I was spending more time in praying and making dua and tasbeeh nawafil and now I hv joined work so I don't get much time. I feel something is missing.I'm not satisfied just praying 4 rakat namaz. What act should I do other than namaz while working? To get closer to Allah. And if I dont pray nawafil, tasbeeh and if I dont make long dua then is it a sin? Will I be questioned for this?

Do dikr whenever u can. Such as the 4 tasbihs. Recite salawat. No if you don’t do it, it’s not a sin. Do what you can. Allah will help you